OG-107

The OG-107 was the basic work utility uniform (fatigues) of all branches of the United States Armed Forces from 1952 until its discontinuation in 1989. The designation came from the U.S. Army's coloring code "Olive Green 107" and "Olive Green 507", which were shades of dark green, the OG-107 being cotton and OG-507 polyester-cotton blend introduced in the early 1970s. Regardless of the fabric, the two shades were almost identical. The OG-107 was superseded by the Battle Dress Uniform (BDU) throughout the 1980s, and was also used by several other countries, including ones that received military aid from the United States.

All versions of the OG-107 shared several basic design features. They were made out of an 8.5 ounce cotton sateen. The shirt could be tucked in or worn outside the trousers depending on the preference of the local commander. If sufficiently hot and humid, troops could be permitted to roll up the sleeves (seldom) and unblouse the trousers. It consisted of a button front and two simple patch pockets on the upper chest that closed by means of a buttoned flap. The trousers were straight leg pants intended to be bloused (tucked in) into boot tops with two simple patch pockets in the front with slash openings and two simple patch pockets on the back with a button flap. The cotton versions tended to fade quickly to greenish grey while the poly-cotton variant used in the OG-507 stayed darker much longer.

The OG-107 uniform was introduced in 1952, and, succeeding the M1943 Uniform, it became the standard for use both in the United States and on overseas deployment by the beginning of the Vietnam War. As the Tropical Combat Uniform (jungle fatigues) became more plentiful in South Vietnam, they began to replace the OG-107 Uniform in combat units. A rough time line is that line infantry units from "standard" divisions (not airborne or Special Forces) began receiving jungle fatigues in the spring of 1966 and the OG-107 was slowly relegated to use in rear areas.

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